Chernyh N.I. Russia Institut matematiki i mekhaniki UrO RAN, Ekaterinburg, ul. Sofi Kovalevskoj, 16, Ekaterinburg, Sverdlovskaya obl., 620049 Nikolai.Chernykh@imm.uran.ru Author's articles The Full Class of Smooth Axially Symmetric Longitudinal-Vortex Unit Vector Fields
